3. Classify the wave conditions in question 1 as either linear or non-linear and indicate, for the non-linear condition(s), an analytical theory (or theories) suitable for describing the waves. [30 marks] 4. For the case(s) for which linear wave theory is identified as unsuitable in question 3, note what effects the non-linearity would have on the calculated values in question 1. [10 marks] 5. Waves generated during a storm have a distribution of frequencies. They also have a spread of directions. So why does swell look so regular? Provide sketches if it helps your explanation. [20 marks]